System: Arch Linux Kernel 6.14.7, AMD RX9070XT mesa 25.0.5, KDE 6.3.5 (wayland session)

When I run games using a version of Proton 9, things work fine. However Proton 10 does not. Tried the stock beta, and experimental). It seems like it's something to do with Python because I get the following errors in the terminal that don't show up when running something using Proton 9:

Traceback (most recent call last):
  File "/steam/SteamLibrary/steamapps/common/Proton 10.0/proton", line 1847, in <module>
    g_session.init_session(sys.argv[1] != "runinprefix")
  File "/steam/SteamLibrary/steamapps/common/Proton 10.0/proton", line 1754, in init_session
    g_compatdata.setup_prefix()
  File "/steam/SteamLibrary/steamapps/common/Proton 10.0/proton", line 1163, in setup_prefix
    setup_openvr_paths()
  File "/steam/SteamLibrary/steamapps/common/Proton 10.0/proton", line 333, in setup_openvr_paths
    contents = json.load(file)
  File "/usr/lib/python3.9/json/__init__.py", line 293, in load
    return loads(fp.read(),
  File "/usr/lib/python3.9/json/__init__.py", line 346, in loads
    return _default_decoder.decode(s)
  File "/usr/lib/python3.9/json/decoder.py", line 337, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "/usr/lib/python3.9/json/decoder.py", line 355, in raw_decode
    raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)